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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.gallery3d.filtershow.filters;
     18 
     19 import android.content.res.Resources;
     20 import android.graphics.Bitmap;
     21 import android.graphics.BitmapFactory;
     22 import com.android.gallery3d.app.Log;
     23 
     24 public class ImageFilterFx extends ImageFilter {
     25     private static final String LOGTAG = "ImageFilterFx";
     26     private FilterFxRepresentation mParameters = null;
     27     private Bitmap mFxBitmap = null;
     28     private Resources mResources = null;
     29     private int mFxBitmapId = 0;
     30 
     31     public ImageFilterFx() {
     32     }
     33 
     34     @Override
     35     public void freeResources() {
     36         if (mFxBitmap != null) mFxBitmap.recycle();
     37         mFxBitmap = null;
     38     }
     39 
     40     @Override
     41     public FilterRepresentation getDefaultRepresentation() {
     42         return null;
     43     }
     44 
     45     public void useRepresentation(FilterRepresentation representation) {
     46         FilterFxRepresentation parameters = (FilterFxRepresentation) representation;
     47         mParameters = parameters;
     48     }
     49 
     50     public FilterFxRepresentation getParameters() {
     51         return mParameters;
     52     }
     53 
     54     native protected void nativeApplyFilter(Bitmap bitmap, int w, int h,
     55                                             Bitmap fxBitmap, int fxw, int fxh,
     56                                             int start, int end);
     57 
     58     @Override
     59     public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
     60         if (getParameters() == null || mResources == null) {
     61             return bitmap;
     62         }
     63 
     64         int w = bitmap.getWidth();
     65         int h = bitmap.getHeight();
     66 
     67         int bitmapResourceId = getParameters().getBitmapResource();
     68         if (bitmapResourceId == 0) { // null filter fx
     69             return bitmap;
     70         }
     71 
     72         if (mFxBitmap == null || mFxBitmapId != bitmapResourceId) {
     73             BitmapFactory.Options o = new BitmapFactory.Options();
     74             o.inScaled = false;
     75             mFxBitmapId = bitmapResourceId;
     76             if (mFxBitmapId != 0) {
     77                 mFxBitmap = BitmapFactory.decodeResource(mResources, mFxBitmapId, o);
     78             } else {
     79                 Log.w(LOGTAG, "bad resource for filter: " + mName);
     80             }
     81         }
     82 
     83         if (mFxBitmap == null) {
     84             return bitmap;
     85         }
     86 
     87         int fxw = mFxBitmap.getWidth();
     88         int fxh = mFxBitmap.getHeight();
     89 
     90         int stride = w * 4;
     91         int max = stride * h;
     92         int increment = stride * 256; // 256 lines
     93         for (int i = 0; i < max; i += increment) {
     94             int start = i;
     95             int end = i + increment;
     96             if (end > max) {
     97                 end = max;
     98             }
     99             if (!getEnvironment().needsStop()) {
    100                 nativeApplyFilter(bitmap, w, h, mFxBitmap, fxw, fxh, start, end);
    101             }
    102         }
    103 
    104         return bitmap;
    105     }
    106 
    107     public void setResources(Resources resources) {
    108         mResources = resources;
    109     }
    110 
    111 }
    112